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Note 1 - Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2017

Schedule of Variable Interest Entities [Table Text Block]

	June 30,
	2017
Assets:
Current assets:
Auction proceeds receivable	$	90,824
Total assets	$	90,824

Liabilities:
Current liabilities:
Note payable	$	90,824
Total liabilities	$	90,824

Schedule of Weighted Average Number of Shares [Table Text Block]

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016

Weighted-average shares outstanding-basic		71,821		71,878		71,849		71,835
Common stock equivalents for stock options and restricted shares		680		870		661		830
Weighted-average shares outstanding-diluted		72,501		72,748		72,510		72,665

Property, Plant and Equipment [Table Text Block]

							Estimated
	June 30,			December 31,			Useful Lives
	2017			2016			(in years)
Property and equipment:
Land	$	50,024		$	44,611
Buildings and improvements		149,430			139,078		7	to	40
Equipment		500,361			471,798		3	to	20
		699,815			655,487
Accumulated depreciation		(353,320	)		(329,394	)
Total property and equipment, net	$	346,495		$	326,093

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

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